SANT VICENÃ‡ DE CASTELLET, Spain -- A Spanish takeout restaurant chain called Nostrum Empresa is using a vending machine concept that allows customers with Google Glass-connected spectacles to make purchases using a voice command, without having to take their hands out of their pockets. Consumers interact with the machine and pay for their orders via the Proppos Fast Vending app.

The technology was on display at the recent Mobile World Congress in Barcelona, and at its Nostrum Store in the Spanish city. Proppos Fast Vending is also available for iPhone and Android devices.